Expansion Device

1. An expansion device comprising: a supporting base, comprising a bottom portion, a supporting portion, and an electrical connection port, wherein the supporting portion is connected to the bottom portion and has an insert slot, and the electrical connection port is disposed at the bottom portion; and a hub, slidably disposed within the supporting portion and located between the bottom portion and the insert slot, the hub comprising a first electrical connection element and a second electrical connection element facing away from the first electrical connection element, wherein the first electrical connection element is electrically connected to the electrical connection port, and the second electrical connection element extends into the insert slot.

2. The expansion device according to claim 1 , further comprising a switch circuit slidably disposed within the supporting portion, wherein the switch circuit is located between the hub and the bottom portion and is configured to electrically connect the first electrical connection element and the electrical connection port.

3. The expansion device according to claim 1 , wherein the hub further comprises a protruding block and the protruding block is located between the first electrical connection element and the second electrical connection element, and the supporting portion is provided with a guide slot, wherein the protruding block is slidably disposed in the guide slot and penetrates out of the supporting portion.

4. The expansion device according to claim 1 , wherein the supporting base further comprises a bearing portion located within the supporting portion, the supporting portion further has a slide slot, and the insert slot and the slide slot are separated by the bearing portion, wherein the hub is located within the slide slot, the bearing portion has a groove slot communicating the insert slot and the slide slot, and the second electrical connection element is slidably disposed in the groove slot and penetrates through the groove slot to extend into the insert slot.

5. The expansion device according to claim 1 , wherein the supporting base further comprises a case portion detachably disposed within the supporting portion, and the case portion is located between the bottom portion and the insert slot, wherein the hub is slidably disposed within the case portion, and the second electrical connection element penetrates out of the case portion to extend into the insert slot.

6. The expansion device according to claim 5 , wherein the case portion has a slide slot, the hub is located within the slide slot, and the case portion comprises a bearing wall oriented toward the insert slot, wherein the insert slot and the slide slot are separated by the bearing wall, the bearing wall has a groove slot communicating the insert slot and the slide slot, and the second electrical connection element is slidably disposed in the groove slot and penetrates through the groove slot to extend into the insert slot.

7. The expansion device according to claim 5 , wherein a positioning hole is provided at an inner side of the supporting portion, an elastic positioning element corresponding to the positioning hole is provided at an outer side of the case portion, and the elastic positioning element is configured to lock into the positioning hole.

8. The expansion device according to claim 5 , wherein the hub further comprises a protruding block and the protruding block is located between the first electrical connection element and the second electrical connection element, the case portion is provided with a first guide slot, and the supporting portion is provided with a second guide slot aligned with the first guide slot, wherein the protruding block is slidably disposed in the first guide slot and the second guide slot and penetrates out of the supporting portion.

9. An expansion device comprising: a supporting base, comprising a bottom portion, a supporting portion, and an electrical connection port, wherein the supporting portion is connected to the bottom portion and has an insert slot, and the electrical connection port is disposed at the bottom portion; a hub, slidably disposed within the supporting portion and located between the bottom portion and the insert slot, the hub comprising a first electrical connection element, a second electrical connection element facing away from the first electrical connection element, and a first positioning portion adjacent to the second electrical connection element, wherein the first electrical connection element is electrically connected to the electrical connection port, and the second electrical connection element and the first positioning portion are oriented toward the insert slot; and an adapter, detachably disposed at the hub and located between the hub and the insert slot, wherein the adapter comprises a third electrical connection element electrically connected to the second electrical connection element, a second positioning portion adjacent to the third electrical connection element, and an electrical connection plug facing away from the third electrical connection element, wherein the first positioning portion directly faces the second positioning portion, and the electrical connection plug extends into the insert slot.

10. The expansion device according to claim 9 , further comprising a switch circuit slidably disposed within the supporting portion, wherein the switch circuit is located between the hub and the bottom portion and is configured to electrically connect the first electrical connection element and the electrical connection port.

11. The expansion device according to claim 9 , wherein the hub further comprises a protruding block and the protruding block is located between the first electrical connection element and the second electrical connection element, and the supporting portion is provided with a guide slot, wherein the protruding block is slidably disposed in the guide slot and penetrates out of the supporting portion.

12. The expansion device according to claim 9 , wherein the supporting base further comprises a bearing portion located within the supporting portion, the supporting portion further has a slide slot, and the insert slot and the slide slot are separated by the bearing portion, wherein the hub and the adapter are located within the slide slot, the bearing portion has a groove slot communicating the insert slot and the slide slot, and the electrical connection plug is slidably disposed in the groove slot and penetrates through the groove slot to extend into the insert slot.

13. The expansion device according to claim 9 , wherein the supporting base further comprises a case portion detachably disposed within the supporting portion, and the case portion is located between the bottom portion and the insert slot, wherein the hub and the adapter are slidably disposed within the case portion, and the electrical connection plug penetrates out of the case portion to extend into the insert slot.

14. The expansion device according to claim 13 , wherein the case portion has a slide slot, the hub and the adapter are located within the slide slot, and the case portion comprises a bearing wall facing the insert slot, wherein the insert slot and the slide slot are separated by the bearing wall, the bearing wall has a groove slot communicating the insert slot and the slide slot, and the electrical connection plug is slidably disposed in the groove slot and penetrates through the groove slot to extend into the insert slot.

15. The expansion device according to claim 13 , wherein a positioning hole is provided at an inner side of the supporting portion, an elastic positioning element corresponding to the positioning hole is provided at an outer side of the case portion, and the elastic positioning element is configured to lock into the positioning hole.

16. The expansion device according to claim 13 , wherein the hub further comprises a protruding block and the protruding block is located between the first electrical connection element and the second electrical connection element, the case portion is provided with a first guide slot, and the supporting portion is provided with a second guide slot aligned with the first guide slot, wherein the protruding block is slidably disposed in the first guide slot and the second guide slot and penetrates out of the supporting portion.

17. The expansion device according to claim 9 , wherein the first positioning portion comprises a first magnetic element, the second positioning portion comprises a second magnetic element, and the first magnetic element is magnetically attracted to the second magnetic element.

18. The expansion device according to claim 9 , wherein the first positioning portion and the second positioning portion comprise a coordinating concave-convex structure.